using System;
using System.Collections.Generic;
using Management;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Player
{
    [RequireComponent(typeof(Rigidbody2D))]
    public class Movement : MonoBehaviour
    {
        private static readonly int Spring = Animator.StringToHash("spring");
        [SerializeField] private float runSpeed;
        [SerializeField] private float springPower;
        [SerializeField] private float jumpForce;
        [SerializeField] private float airJumpForce;
        [SerializeField] private SpriteRenderer spriteRenderer;
        [SerializeField] private float turnDelay;
        [SerializeField] private InputActionReference interactReference;
        
        private Animator _springAnimator;
        private Rigidbody2D _rb;
        private bool _grounded = true;
        private bool _facingLeft;
        private float _turnDelayTimer;
        private float _groundedCheckTimer;
        private bool _interact;
        private int _airJumpCharges;
        private bool _jumpPressedThisFrame = true;
        private bool _fireSpring;
        private bool _jump;
        private bool _airJump;
        private Vector2 _airJumpDir;
        private bool _autoDrive = true;

        private void Awake()
        {
            _rb =  GetComponent<Rigidbody2D>();
            InputSystem.actions.FindActionMap("UI").Disable();
            InputSystem.actions.FindActionMap("Player").Enable();
            interactReference.action.performed += HandleInteraction;
            interactReference.action.canceled += HandleInteraction;
        }

        private void Start()
        {
            Cursor.lockState = CursorLockMode.None;
            Cursor.visible = true;
        }

        private void HandleInteraction(InputAction.CallbackContext obj)
        {
            _interact = obj.ReadValueAsButton();
            _jumpPressedThisFrame = _interact;
        }

        private void Update()
        {
            Vector2 mouseScreenPos = Mouse.current.position.ReadValue();

            Vector3 mouseWorldPos = Camera.main.ScreenToWorldPoint(
                new Vector3(mouseScreenPos.x, mouseScreenPos.y, -Camera.main.transform.position.z)
            );

            _airJumpDir = ((Vector2)mouseWorldPos - (Vector2)transform.position).normalized;
            
            _groundedCheckTimer += Time.deltaTime;
            _turnDelayTimer += Time.deltaTime;
            spriteRenderer.flipX = !_facingLeft;
            if (_springAnimator && _jumpPressedThisFrame)
            {
                _groundedCheckTimer = 0f;
                _springAnimator.SetTrigger(Spring);
                _springAnimator = null;
                _grounded = false;
                _fireSpring = true;
                _autoDrive = false;
            }

            if (_grounded && _jumpPressedThisFrame)
            {
                _grounded = false;
                _groundedCheckTimer = 0f;
                _jump = true;
                _jumpPressedThisFrame = false;
            }

            if (!_grounded && _airJumpCharges > 0 && _jumpPressedThisFrame)
            {
                Debug.Log(_airJumpDir);
                _airJump = true;
            }
            
            _jumpPressedThisFrame = false;
        }

        private void FixedUpdate()
        {
            if (_jump)
            {
                _jump = false;
                _grounded = false;
                _rb.AddForce(Vector2.up * jumpForce, ForceMode2D.Impulse);
            }

            if (_airJump)
            {
                _airJump = false;
                _airJumpCharges--;
                _rb.AddForce(_airJumpDir * airJumpForce, ForceMode2D.Impulse);
            }
            
            if (_fireSpring)
            {
                _fireSpring = false;
                _rb.linearVelocityX = 0;
                _rb.AddForce(Vector2.up * springPower, ForceMode2D.Impulse);
            }
            if (_autoDrive)
            {
                _rb.linearVelocityX = _facingLeft ? -runSpeed :  runSpeed;
            }
        }

        private void OnTriggerEnter2D(Collider2D other)
        {
            if (other.gameObject.layer == LayerMask.NameToLayer("Spring"))
                _springAnimator = other.gameObject.GetComponent<Animator>();
            if (other.gameObject.layer == LayerMask.NameToLayer("Pickup"))
            {
                _airJumpCharges++;
                Destroy(other.gameObject);
            }
        }
        
        private void OnTriggerExit2D(Collider2D other)
        {
            if (other.gameObject.layer == LayerMask.NameToLayer("Spring"))
            {
                _springAnimator = null;
            }
        }

        private void OnCollisionEnter2D(Collision2D other)
        {
            CheckCollisions(other);
        }
        
        private void OnCollisionStay2D(Collision2D other)
        {
            CheckCollisions(other);
        }

        private void CheckCollisions(Collision2D other)
        {
            var contacts = new List<ContactPoint2D>();
            other.GetContacts(contacts);
            if (_turnDelayTimer >= turnDelay && 
                other.gameObject.layer != LayerMask.NameToLayer("Spring") && 
                other.gameObject.layer != LayerMask.NameToLayer("Pickup"))
            {
                foreach (var c in contacts)
                {
                    var x = c.normal.x;
                    if (Mathf.Abs(x) > 0.1f)
                    {
                        _facingLeft = !_facingLeft;
                        _turnDelayTimer = 0f;
                        break;
                    }
                }
            }

            _grounded = false;
            if (_groundedCheckTimer > turnDelay)
            {
                foreach (var c in contacts)
                {
                    var y = c.normal.y;
                    _grounded = Mathf.Approximately(1f, y);
                    if (_grounded)
                    {
                        _autoDrive = true;
                        return;
                    }
                }
            }
        }
    }
}